Pumping mechanism



. Oct. 27 ,leis. 1,559,139

7 Y P. L. WILBUR PUMPING MECHANISM Filed Dec. 16, 1921 I? a1 1 g 52' 68 Z J anomtoz zz 5; 30 59 I?L.Wz2b

42' Q331 711's Gum; m i a 1 i Patented Oct. 27, 1925.

UNITED. STATES,

rE'rER L. WILBUR, or recreation, NEW YORK.

IUMPYING MECHANISM.

Application filed December 16, 1921. Serial No. 522,730.

To all whom it may concern:

Be it known that I, PETER L. WILBUR, a citizen of the United States, and a resident of Tuckahoe, in the county of Vestchester and State of New York, have invented certain new and useful Improvements in Pumping Mechanism, of which the following is a specification. I

This invention relates to pumps and par ticularly double acting reciprocable piston pumps, and it is the primary object of the invention to improve the general construction and arrangement of the parts to adapt the same to be connected to and combined with a liquid 'carrying container to discharge the liquid therefrom by the operation of the pump to be used as a sprayer or otherwise;

Itis a further object ofthe invention in pumping mechanism of this character to arrange the same with a discharge nozzle and provide improved valve mechanism operable during the reciprocation of the piston to control the connection of the nozzle with the pump cylinder at opposite sides of the piston.

It is another object of the invention to provide improved means to shut off the pumping mechanism and disconnect the liquid carrying container from the nozzle when the mechanism is not in use.

In the drawing accompanying and forming a part of this specification, Figure 1 is a perspective view of my improved pumping mechanism showing the same connected to a container for discharging the contents of the container.

Figure 2 is a side elevation of the pumping mechanism, partly in section, to illustrate the interior construction and arrange ment thereof.

Figure 3 is a longitudinal sectional view of the discharge end of the pumping mechanism to show the manner, of shutting off the pump from the discharge nozzle.

Figure 4: is a cross sectional View taken .on the line l4 of Figure 2.

Figure 5 is a perspective view of the valve casing and plug for connecting the discharge nozzle with the pumping cylinder at opposite sides of the piston.

Figure 6 is a perspectiveview of avalve to operate in conjunction with the valve casing in F igure 5 to control the connection of the discharge nozzle with the pump cylinder at opposite sides ofthe piston.

Figure 7 is a view similar to Figure 3 showing modified' means for shutting 01f the pump from the discharge nozzle. I Figure 8 is a view similar to Figure 7 but showing the parts inposition with the discharge nozzle open to the pump.

Figure 9 is a perspective view of the valve mechanism disassembled for controlling the discharge ofthe liquid from the cylinder at opposite sides ofthe piston shown in Figures 7and 8. ,v

Figure 10 is a perspective view' of the discharge nozzle. H I I i F igure 11 is a'perspective. view, partly in section, and enlarged of the end of the piston cylinder to showthe arrangement thereof for mounting therein the valve casing shown in Figures 5 and 9; and

Figure 12 is a view similar to Figure 3 showing a -modified form of valve mechanism to control the discharge of the "liquid from opposite ends of the pump and shut off the pump from the pump outlet.

Similar characters of reference designate likeparts throughout the different views of the drawing.

In the drawing the improved pumping mechanism is mounted upon the exterior of a liquid carrying container C, shown as of circular form and substantially flat with the pumping mechanism mounted on one of the ends in communication with the interior of the container to discharge the'contents of the container by the'manipulation of the pump for use as a sprayer or the like. The embodiment of the mechanism illustrated comprises a cylinder 12 mounted at opposite, ends in heads 13, 13, said heads being of. semi-circular form with the flattened portion 14: (Figure lfadapted to liecontiguous to the outer surface of the. container when the pump is mounted upon the latter assliown in Figure 1. nozzle 15 is so: cured in oneend of the cylinder and a perforated plug 16 engages in the opposite end of the cylinder. A piston-17 arranged with suitable packing separates the cylinder into two'chambers, the piston being reciprocated by a rod l8 fixedto the piston and extending through a stufling box 19Iarranged in the plug 16 andthe perforation in said plug to the exterior of the cylinder and has mounted thereon an operating handle 20.

Inlet ports in the wall of the piston cylinder at opposite sides of the piston register with lateral ports inthe heads 13, 13, as

shown at 21, 21, which ports communicate with openings 22 in said heads, tubes 23, 24 extending longitudinally of the piston cylinder being connected at one-end; with saidopenings 22 and arranged at said ends with seats for suction valves 25, 25" shown. of the ball type, to control the flow or entrance of liquid to the chambers at opposite sides of the piston during the reciprocation of the piston The opposite ends of the openings are closed by plugs 26 having a portion 27 of reduced cross sectional dimension at the inner ends of the plugs to extend into said openings for a purpose to be hereinafter described. The tubes 23, 2a through the openings 22 communicate with the chamber at the opposite sides of the piston through the ports 2.1, 21. The oppositeends of'the tubes are connected to achamber in a casing 28 (Figures 2 and 4) located substantially midway between the ends of the cylinder and extending laterally to engage between the cylinder and container and having an inlet 29 (Figure 4%) substantially at the axis of the container for connection with the interior of the container centrally or axially thereof.

The discharge of the liquid from the chambers of" the piston cylinder at opposite sides of the piston is through a per forated plug 30-mounted in the cylinderbetween the nozzle and an inwardly extending annular bead 31 formed in the cylinder, said plug being arranged with a triangular shaped recess 32 communicating with the nozzle orifice and having a port 33 axially of the cylinde'r through which to discharge the-liquid from the chamber in front of the piston, said plug being arranged at the inner end within the cylinder with a valve seat 34 for a purpose to be hereinafter described. To discharge the liquid from the chamber of the cylinder in back of the piston a lateral port in the plug 30 registers with a port 36 inthe cylinder and a port 37 in the head 13, a tube or, pipe 38 extending longitudinally of the piston cylinder being connected at oneend to aport 39in the head 13, said latter port registering with a port 40 in the wall of the cylinder.

The plug 16 has a portion of reduced diameter within the cylinder to provide a passage for the entrance of liquid through the port 21 to the cylinder and thedischarge of the liquid through the port 40. The valve plug 30 at the nozzle end of the cylinder also has a longitudinal recess 41 in the outer wall in con'nnunication with the port 21' and cylinder for the entrance of the liquid through port21 to the cylinder-chamber in front of the piston.

To control the ports 33 and 35, 36, 37 and the alt atedischarge of the liquid from the cylin chambers at opposite sides of the piston, a valve 42 (Figure 6) of acute triangular shape-in longitudinal section and of less cross sectional area than the chamber 32 in the plug 30 is arranged in the plug chamber 32, as shown in Figure 2. As the piston is moved inward into the piston cylinder to discharge the liquid from the chamber in front of the piston through the axial port 33 the pressure of the liquid will move the valve 42 toward and hold it against the port 35, maintaining an opening through the plug; chamber 32 in communication with the plug port 33 and nozzle orifice, as shown in Figure 3. As thepiston is moved outward and the liquid is discharged from the cyl inder chamber in back of the piston the entrance of the liquid through the cylinder port 35 into the plug chamber 32 will seat and hold the valve 4E2 in position to close the axial port 33 and shut off said port from the nozzle orifice and maintain an open passage between the port 35 and nozzle orifice through the chamber 32 by a recessed por tion 42 in the valve 42 as shown in Figure 2, the valve and chamber being arranged and constructed so that the valve will oscillate or rock on the apex thereof, as shown at 32 in Figure 2.

As the liquid is discharged from in front of the piston. any liquid passing through the plug recess ll and cylinder inlet port 21 will be caused to impinge against the rear side of the valve 25 due to the closure plug projection 27 extending to or beyond the axis of the port 21 and seat the valve upon the valve seat at the end of the tube 2&.

During this movement of the piston suction at the back of the piston will unseat th' valve from the seat of tube 23 and draw liquid through said tube and port 21 into the chamber at the rear of the piston. During the reverse movement of the piston the valve 25 will be seated and the valve 25 unseated.

The chamber ot the casing 28 and thereby the pumping mechanism is connected with the interior of the container C by a tubular extension $3 of a ball shaped member 14 passing to the interior of the container through an opening axially or centrally in the wall thereof and secured in the inlet to the casing chamber 28.

To connect the pumping mechani m with the liquid in that portion of the container which is lowermost a tubular pick up comprising a tube 45 is connected at one end to the ball member li in fluid communication with the tubular portion 43 and to have universal movement, the opposite inlet end of the pick up extending to the side wall of the container. The pick up tube is connected to the ball member as by a coupling comprising a member 16 (Figure l) in which the tube is fixed and arranged with a socket portion $7 conforming to the shape of the ball member -and mounted upon said latter member by having threaded connection with a cup sha ed member 48 loosely mounted on the tu ular portion 43 of the ball member 44 between said member and the wall of the container. Suitable packing of anti-friction material is. interposed between the cupped member 4S,socket portion of coupling-member 4E6. and the ball member 4.4 as shown at 4:9 and 50. I

To shut off the nozzle orifice from the pumping mechanism and thereby from the container to prevent leakage from the container and pump when not in use the piston is arranged to engage the seat 34 at the in ner end of the valve plug 30 and a plunger .51. is carried at the inner end of the piston to .pass through the axial port of the plug valve chamber to engage and hold the valve 42 against the port 35 to close the same, said valve in the faceadjacent the port having an inset of suitable material, such as velumoid,.to assure the sealing of the port and prevent adhesion of the valve to the wall of the chamber 32 due to the corrosive action of'the liquid in the pump or otherwise. The, plunger 51 isslidably mounted in the piston. For this purpose the piston is constructed of a tube 52 of less diameter than the cylinder having the piston rod secured in one end and an annular flange at the end of the connection with the piston rod. A perforated cap 53 is threaded to the opposite end of the tube to form a shoulder between which shoulder and the tube flange the piston packing is clamped.

The plunger 51 passes through the cap perforation and has an annular shoulder within the piston with an extended portion to sliclably engage in an opening in the end of the piston rod with a spring 56 coiled about saidplunger extension and confined between the end of the piston rod and the plunger flange to urge the plunger outward with the plunger flange in engagement with the cap 53. A perforate disk 57 of suitable inaterial, such as velumoid, is carried at the end of the piston cap to engage the seat 34 of the valve plug 30 to assure the sealing ot said port. It will thus be obvious that when the piston is moved to its innermost posi-' tion the disk 57 carried at theend of the piston will bear against the seat 34 and the piston plunger 51 will yieldingly engage the valve 42 though firmly seating the same to seal the port 35.

The piston is retained in its innermost sealing position by cam projections 58 ex tending laterally from the handle which are adapted to'pass through recesses 59 in the wall of an inwardly extending annular flange of a tubular portion of the head 13 extendinglongitudinally of the piston rod, and, the engagement of saidcam projection below the flanged portion of the tubular projection. 1

To permit of the entrance of air to the container C to displace the liquid as it is discharged therefrom by the pumping mechanism the stufling box carrying plug 16' is arranged with a portion of reduced diame- .ter between the threaded portion of the plug and an annular flange 60 of the plug engaging at the outer end of the head 13 thereby forming an annular recess or chain ber 61- between-the plug and head with which a port 72 open to the atmosphere communicates. The chamber 61 is in communication with the interior of the container C through a port in the head 13 and a tube engaging in said port and extending into the container, as shown at 73 in Figures 1 and 2. To seal this-airinlet port when the device is not in use and prevent the leakage of the liquid therethrough, a

suitable packing material, such ascork, velnmold, or the like 62 is'seated in the annular recess ofthe operating handle at the packing 62 also serves to seal the piston rod 7 when the device is not inuse. V

In Figures 7,8 and 9 there is shown a modified form of the valve shown in Figure 2. In this structure the recess 32 in the plug is of triangular form but is not cut ling the ports 33, 35 is in the form of a flap valve consisting of a plate 65 pivotally mounted in the plug recess to have movement toward and away from the ports 33, 35 by pins 66 engaging in perforations in the plug and in opposite recesses 67 in the valve. To shut off the interior of thepumping mechanism from thenozzle orificewith this construction of valve the plunger 51v carriedby the pistonpasses through the port of the plug with the end to seat'in and close the nozzle orifice the nozzle having an inset of suitable material having a perforation in line with the nozzle orifice, as shown at 68,-to facilitate the sealing of the nozzle orifice. I

In Figure 121 have shown a further modified construction and arrangement of valve mechanism to control the connecting of the piston cylinder at opposite sides of the piston with the nozzle orifice and con- .trol' the discharge of the liquid from opposite sides of the piston as well as to shut ofi' the pumping mechanism from the nozzle orifice. A plug 30 is arranged in the piston cylinder within the nozzle said plug same being of reduced diameter at the inner end to constitute the outlet port 33 ot the piston chamber in front of the piston. The outer end of the bore of the plug is closed by a block 33 forming a chamber within the plug with which port 33 communicates and connected with the cylinder port 36 through a longitudinal recess 31 in the outer surface of the plug 30 which is also in communication with the chamber in the plug through the port in the block 33, as shown at 35. The chamber within the plug is connected with the nozzle orifice through a port having an opening 71 in the plug chamber. The ports 33 and 35 are controlled by a valve in the form of a disk 42 slidably mounted to have longitudinal movement in the plug chamber. When the liquid is being discharged from the rear of the piston the valve assumes the position shown in Figure 12 opening the port 35 to the opening 71 of port 70, and when the piston is moved inward to discharge the liquid from in front thereof the valve a2 is seated against an annular seat closing port 35 and opening port 33 to the port 71. To shut off the pumping mechanism from the nozzle outlet the piston is arranged with the spring influenced plunger 51 as hereinbefore described the piston also being provided with a sealing disk 57 to seat against the annular seat 34: at theinner end of the plug to seal the port 33 when the piston is in its innermost position. When the piston is in this latter position the plunger passes through the port 33 moving the valve and holding it against the valve seat 7 5 to close the port 35, the face of the valve adjacent the port 35 having an inset of suitable material such as velumoid to seal the port and also preventing sticking of the valve by corrosion or otherwise.

Having thus described my invention I claim:

1. In pumping mechanism, a cylinder having a discharge nozzle; a piston reciprocable in said cylinder; valve controlled inlet ports to the cylinder at opposite sides of the piston; outlet ports connected to the nozzle and communicating with the cylinder at-opposite sides of the piston; a valve to control the opening and closing of said outlet ports, said piston being arranged to seat said valve to close one of the ports and to close the other port when the piston is in its innermost position to shut off the interior of the pumping mechanism from the atmosphere through the discharge nozzle.

2. In pumping mechanism, a cylinder having a discharge nozzle; a piston to reciprocate in the cylinder; valve controlled ports to the cylinder at opposite sides of the piston; outlet ports connected to the nozzle'and communicating with the cylinder at opposite sides of the piston; and a valve to control the opening and closing of said outlet ports said piston being arranged to cooperate with said valve to maintain the outlet ports closed when in its innermost posit-ion.

3. In pumping mechanism, a cylinder having a discharge nozzle; a piston to reciprocate in the cylinder; valve controlled ports to the cylinder at opposite sides of the piston; ports connected to the nozzle and communicating with the cylinder at opposite sides of the piston; and a valve to control the opening and closing of said latter ports; said piston being arranged to close one of the outlet ports and carrying means to cooperate with the valve to close the other outlet port when the piston is in its innermost position. a 1

1-. In pumping mechanism a cylinder having a discharge nozzle; a piston to reciprocate in the cylinder; valve controlled inlet ports to the cylinder at opposite sides of the piston; an outlet port axially of the cylinder to connect the cylinder at one side of the piston with the nozzle orifice; an outlet port in communication with the nozzle orifice connected to the cylinder at the opposite side of the piston; and a valve to-control the opening and closing of said outlet ports; said piston being arranged to close the axial outlet port and carrying means to seat the outlet valve against and close the other outlet port when the piston is in its innermost position.

5. In pumping mechanism a cylinder having a discharge nozzle; a piston to recipro cate in the cylinder; valve controlled inlet ports to the cylinder at opposite sides of the piston an outlet port axially of the cylinder to connect the cylinder at one side of the piston with the nozzle orifice; an outlet port in communication with the nozzle orifice connected to the cylinder at the opposite side of the piston; a valve between said ports operable to control the opening and closing thereof; means to close the axial port when the piston is in its innermost position; a plunger carried at the inner end of the piston to pass through the axial port and seat the outlet control valve against the other outlet port when the piston is in its innermost position; and means to releasably 1001: the piston in such position.

6. In pumping mechanism, a cylinder having a discharge nozzle; a piston to reciprocate in the cylinder; valve controlled inlet ports to the cylinder at opposite sides of the piston; a plug in the cylinder adjacent the discharge nozzle having a port axially of the cylinder in communication with thenoz zle orifice to connect the cylinder in front of the piston with thenozzle orifice, and having a lateral port in communicationwith the nozzle orifice and connected to the cylinder in back of the piston; and a valve in. said plug operable during the reciprocation ofthe piston to controlthe opening and closing of the plug ports and-the connection of the cylinder at opposite sides of the piston with the nozzle orifice. j

7. In pumping mechanism, a cylinder having a discharge nozzle; a piston to reciprocate in the cylinder; valve controlled inlet in back of the piston; a valve in said plugv operable during the reciprocation of the piston to control the opening and closing of the plug ports and the connection of the cylinder at opposite sides of the piston with the nozzle orifice; means carried by the piston to co-operate with said valve to seat the same against and close the lateral plug port and to close the axial port when the piston is .in its innermost position; and means to retain the piston in its innermost position.

8. In pumping mechanism, a cylinder having a discharge nozzle and a stuffing box at the opposite end; a piston to reclprocate 1n the cylinder; valve controlled ports to the cylinder at opposite sides of the piston; an outlet port axially of the cylinder to connect the cylinder at oneside of the p ston with'the nozzle orifice and arranged with a v valve seat within the cylinder; an outlet port in communication with the nozzle orifice connected to the cylinder at the opposite slde of the piston; a valve between said ports to control the opening and closing of said outlet ports; means carried by the piston to cooperate with the valve seat of the ax al outlet port to close the same when the plston 1s in its innermost position; a plunger slidably mounted in the piston and normally urged outward therefrom-to pass through the axial outlet port and engage the outlet valve to seat the same against and close the other outlet port to the nozzle orifice when the plston is in its innermost position; and means to lock the piston of the pumping mechanism to releasably retain the piston in its innermost position, and carrying means to seal the stuffing box when in such position.

9. The combination with a liquid carrying container, of pump mechanism mounted upon the exterior of the container comprlsing a cylinder having a nozzle at one end, heads in which the cylinder is mounted at opposite ends, said heads having a portion to conform to and lie contiguous to the outer surface of the container and arranged with valve controlled inlet ports connected to' opposite endsof the cylinder; means to connect the inlet ports with the interior of the container; outlet means from the cylihderat opposite sidesjof the pistonlconnected to the nozzle; valve mechanism to control said outleit ineja'ns'to the nozzle;1a piston to reciprocate in the cylinder; andmeans car- IIGCl' by the piston and co-operating with the outlet control valve mechanism wheir in its! innermost position to shut off the pump ng mechanism and container from the discharge nozzle.

10. In pumping mechanism, a cylinder having a discharge nozzle at one end; a'

piston to reciprocate in the cylinder having an operating rod extending from the end of the cylinder opposite to the nozzle; valve controlled inlet ports to thecylinder at oppos te sides of the piston; a plug in the cylinder adjacent the nozzle having a port axially of the cylinder in communication with the nozzle orifice to connect the cylinder in front of the piston with the nozzle; a lateral port in said plug in communication with the nozzle orifice connected to the cylinder the rear side of the piston; a valve carried by said plug operable to control the connecting and disconnecting of said ports, and thereby the cylinder, at opposite sides or" the piston with the nozzle orifice; a plunger slidably carried in the inner end of the piston; a spring Within the p ston to urge the plunger outward from the piston: said plunger being adapted to pass through the axial port of the plug and operable to seat the valve against the lateral plug port to close the same and the piston being adapted to be seated against and close the axial port when the piston isin its innermost position. I v

11 In pumping mechanism, a cylinder havmg a discharge nozzle at one end; a piston to reciprocate in the cylinder; valve controlled inlet ports to the cylinder at opposlte sides of the piston; a plug in the cylinder adjacent the nozzle having atriangular recess in the end adjacent the nozzle and in communication therewith; and a port in said plug axially of the cylinder in communication, with the plug recess to connect the cylinder in front of the piston with the nozzle; a lateral port from said plug recess connected to the cylinder at the rear side of the piston; a valve of acute triangular shape in cross section in the plug recess operable to control the connecting of the plug ports and thereby the cylinder at opposite sides of the piston with the nozzle orifice.

12. The combination with a liquid carrying container, of cylinder pumping mechanism including a cylinder in communication with the liquid in the container, a reciprocable piston, a pistonrod and operating handle connected to the rod to discharge the liquid from-the container; a plug errangecl in one end of the cylinder carrying a stuffing box in Which the "piston rod 0pemtes, said plug having an annular, redu'cecl'poftion' to co-operate with the cylinder to provide an annular chamber, a port in the plug to connect said. chamber With the atmosphere, at second port in the plug to connect the interior of the container with said plug chamber, and means to seal the first named port in said chamber to the atmosphei'e when he piston; is in its'inn ei 'm ogst poition, comprising en nnnnlar seat elfi'anged at the outelf side of the plug, packing carried in an annn a l seat of the opefat ing handle the connection thereof with the piston rod to eo-operate with said seat; and means to lock the rod in such position. Signe'cl'at the city of New York, in the county of' New York and State of New York December, 1921.

PETER L. XVILBUR. 

